Why would you not use the traction mode all the time on snow? In those conditions you will get better traction, and you still have stability control. My experience is that you need to take more risk to drive the same speed with full traction control enabled.

The traction control isn't all about stopping the wheels from spinning while accelerating. It also helps you control the car when it goes sideways. Even at 60 km/h it's pretty scary when the car goes into an unplanned slide, and in those situations I want the electronics to kick in as soon as possible.

At these speeds and higher you will hardly ever experience that you don't have enough forwards momentum to get up a hill. Should this ever happen, then switching DTC on could help you. But leaving it on for all driving on snow, that is just begging for an accident to happen. Unless of course you've got mad skills.